7 — 9500 MPR/9500 MPRe port object configuration
Alcatel-Lucent 5620 Service Aware Manager, Release 11.0 R5 September 2013 7-3
3HE 08459 AAAA TQZZA Edition 01
MPR User Guide
• traffic storm control
A traffic storm occurs when packets flood a LAN creating excessive traffic and
degrading network performance. You can use traffic storm control to prevent
Ethernet ports from being disrupted by a broadcast, multicast, or unicast traffic
storm on the physical interfaces, and limit the impact of VLAN
misconfigurations.
Traffic storm control monitors the incoming traffic levels over a 1-s interval and,
during the interval, compares the traffic level with the traffic storm control level
that you configure on the 5620 SAM. The traffic storm control level is a
percentage of the total available bandwidth of the Ethernet port. For example, if
traffic storm control is enabled for ingress traffic and it reaches the configured
level on the port with the interval, the traffic is dropped until the traffic storm
control interval ends.
• port rate limiting
You can use port rate limiting to protect the radio-side bandwidth from being
overloaded by an ingress or egress port. A common application for port rate
limiting is when a 9500 MPR provides the backhaul service for multiple
7705 SAR devices whose queues do not have the visibility of the bandwidth
available of the radio side.
• dot1q VLAN rate limiting
You can use VLAN rate limiting to protect the radio side bandwidth on the
9500 MPR from being overloaded by an ingress port when transporting IP/MPLS
over MPR transport services on dot1q VLANs. A common application of the
VLAN rate limiting feature is to monitor the 9500 MPR backhaul services
providing transport to multiple 7705 SAR devices whose queues could
individually exceed the available radio bandwidth.
Traffic storm control, port rate limiting, and dot1q VLAN rate limiting are supported
on the core-enhanced card and the 4+4 × Ethernet (EAS) card on the 9500 MPR.
See Procedure 7-1 for information about enabling traffic storm control, port rate
limiting, and dot1q VLAN rate limiting on the 9500 MPR.
7.2 Workflow to manage port objects on 9500 MPR/9500 MPRe
devices
The following workflow describes the sequence of high-level tasks required to configure
and manage 9500 MPR or 9500 MPRe device ports; see the “Port and channel object
configuration” chapter in the 5620 SAM User Guide for the generic procedures that
apply to this device type. In addition, configure the following device-specific
procedures as required:
1 As required, change the port mode between Network, Access, and Hybrid modes.
See the “Port and channel object configuration” chapter in the 5620 SAM User
Guide for the generic procedures that apply to this device type.
2 As required, configure the ports on 9500 MPR or 9500 MPRe devices:
a Ethernet ports; see Procedure 7-1
b 2 × STM card ports; see Procedure 7-2
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